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WAN Protocol, Virtual Interface and Queue

Folks,

I have a question here. I want to know that when we configure WAN protocols like OSPF or BGP, then can we configure virtual interface out of a single physical port? If yes then can we assign different virtual interface to different WAN protocols? If Yes then how it will effect the Queuing capability of the physical port?

Sugata

2 ACCEPTED SOLUTIONS

Accepted Solutions
Cisco Employee

Re: WAN Protocol, Virtual Interface and Queue

Hi Sugata,

There are different type of virtual interface. Tunnel, sub-interface, loopback, null0, mlppp... Some of the virtual interface can use same physical interface. You can configure different routing protocol for each virtual interface. That will not affect the queuing on the physical interface.

HTH,
Lei Tian

Sent from Cisco Technical Support iPhone App

Super Bronze

Re: WAN Protocol, Virtual Interface and Queue

Disclaimer

The   Author of this posting offers the information contained within this   posting without consideration and with the reader's understanding that   there's no implied or expressed suitability or fitness for any purpose.   Information provided is for informational purposes only and should not   be construed as rendering professional advice of any kind. Usage of  this  posting's information is solely at reader's own risk.

Liability Disclaimer

In   no event shall Author be liable for any damages whatsoever (including,   without limitation, damages for loss of use, data or profit) arising  out  of the use or inability to use the posting's information even if  Author  has been advised of the possibility of such damage.

Posting

As noted by Lei, the answers to your first two questions is normally yes.

In answer to your third question, it depends on what you're trying to do and the capabilities of the platform.  If you want to configured explicit QoS per logical interface, devices that allow that may "balk" at also assigning explicit QoS at the physical interface.  Also explicit QoS on the physical interface might be limited by what it "sees".  For example, physical interfaces, usually by default, will see a tunnel's outer packet as just the encapsulated packet while QoS on a tunnel "sees" the unencapsulated packet.

2 REPLIES
Cisco Employee

Re: WAN Protocol, Virtual Interface and Queue

Hi Sugata,

There are different type of virtual interface. Tunnel, sub-interface, loopback, null0, mlppp... Some of the virtual interface can use same physical interface. You can configure different routing protocol for each virtual interface. That will not affect the queuing on the physical interface.

HTH,
Lei Tian

Sent from Cisco Technical Support iPhone App

Super Bronze

Re: WAN Protocol, Virtual Interface and Queue

Disclaimer

The   Author of this posting offers the information contained within this   posting without consideration and with the reader's understanding that   there's no implied or expressed suitability or fitness for any purpose.   Information provided is for informational purposes only and should not   be construed as rendering professional advice of any kind. Usage of  this  posting's information is solely at reader's own risk.

Liability Disclaimer

In   no event shall Author be liable for any damages whatsoever (including,   without limitation, damages for loss of use, data or profit) arising  out  of the use or inability to use the posting's information even if  Author  has been advised of the possibility of such damage.

Posting

As noted by Lei, the answers to your first two questions is normally yes.

In answer to your third question, it depends on what you're trying to do and the capabilities of the platform.  If you want to configured explicit QoS per logical interface, devices that allow that may "balk" at also assigning explicit QoS at the physical interface.  Also explicit QoS on the physical interface might be limited by what it "sees".  For example, physical interfaces, usually by default, will see a tunnel's outer packet as just the encapsulated packet while QoS on a tunnel "sees" the unencapsulated packet.

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